You are asked to design a file system which provides two functions:
- createPath(path, value): Creates a new path and associates a value to it if possible and returns
True. ReturnsFalseif the path already exists or its parent path doesn't exist. - get(path): Returns the value associated with a path or returns
-1if the path doesn't exist.
The format of a path is one or more concatenated strings of the form: / followed by one or more lowercase English letters. For example, /leetcode and /leetcode/problems are valid paths while an empty string and / are not.
Implement the two functions.
Please refer to the examples for clarifications.
Example 1:
Input:
["FileSystem","createPath","get"]
[[],["/a",1],["/a"]]
Output:
[null,true,1]
Explanation:
FileSystem fileSystem = new FileSystem();
fileSystem.createPath("/a", 1); // return true
fileSystem.get("/a"); // return 1
Example 2:
Input:
["FileSystem","createPath","createPath","get","createPath","get"]
[[],["/leet",1],["/leet/code",2],["/leet/code"],["/c/d",1],["/c"]]
Output:
[null,true,true,2,false,-1]
Explanation:
FileSystem fileSystem = new FileSystem();
fileSystem.createPath("/leet", 1); // return true
fileSystem.createPath("/leet/code", 2); // return true
fileSystem.get("/leet/code"); // return 2
fileSystem.createPath("/c/d", 1); // return false because the parent path "/c" doesn't exist.
fileSystem.get("/c"); // return -1 because this path doesn't exist.
Constraints:
- The number of calls to the two functions is less than or equal to
10^4in total. 2 <= path.length <= 1001 <= value <= 10^9
NOTE: create method has been changed on August 29, 2019 to createPath. Please reset to default code definition to get new method signature.